Sorry, I should have been clearer, I have not done mine yet and will do the job next winter when the car is not being used as much. All that's happening at the moment is the MIL light comes on when driving slow, no limp mode and I leave the harness from my code reader connected so I can clear the code in under a minute. I asked if the dealer had a note of numbers and was told they change which is strange as the main thing is number of wires, wire colour, wire length and connector plug type....round or square.....If I can't read the numbers I will try the factors for a match from the suppliers or try some photos and dimensions via NGK. If it were a one size fits all I suspect given the numbers of failures the numbers would have been circulated by now ;-).
